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Main CBA Bottom View
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CAUTION ! :
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
4A/125V
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
WF7
WF8
WF9
PIN 11 OF
PIN 9 OF
PIN 7 OF
CN103A
CN103A
CN103A
10-16
Because a hot chassis ground is present in the power
supply circuit, an isolation transformer must be used.
Also, in order to have the ability to increase the input
slowly,when troubleshooting this type power supply
circuit, a variable isolation transformer is required.
WF10
Q704
Emitter
WF11
WF12
Q705
Q706
Emitter
Emitter
WF13
PIN 1 OF
CN1701
WF14
PIN 3 OF
CN1701
WF15
PIN 6 OF
CN1701
WF16
PIN 8 OF
CN1701
WF17
PIN 11 OF
CN1701
WF6
PIN 14
OF IC801
MAIN CBA
Ref No.
Position
Ref No.
Position
ICS
TRANSISTORS
IC31
E-4
Q601
B-5
D-4
B-5
IC531
Q603
D-3
A-5
IC533
Q633
IC601
A-5
Q701
D-2
IC671
D-4
Q702
D-2
D-4
Q703
D-2
IC672
E-2
Q704
E-1
IC781
IC801
D-5
Q705
E-1
IC851
D-2
Q706
E-2
IC852
E-3
E-2
Q707
IC1652
C-4
E-2
Q708
TRANSISTORS
D-5
Q802
Q32
E-4
Q803
D-4
Q401
B-2
Q804
E-2
Q403
B-1
Q1651
C-4
Q404
B-1
Q1652
C-3
Q405
B-1
Q1653
C-3
Q406
B-1
Q1654
C-4
Q407
A-1
Q1655
C-4
Q408
C-1
Q1656
C-4
Q409
A-2
Q1657
C-4
Q410
B-1
Q1701
E-1
Q411
B-2
CONNECTORS
Q412
B-2
CN101A
C-2
Q415
B-3
CN102A
C-2
Q416
B-3
CN103A
D-2
Q421
B-1
CN113
E-2
Q422
B-1
A-2
CN402
Q423
B-1
A-5
CN403
Q424
A-2
CN801
E-5
Q427
B-2
CN802
A-5
Q428
B-2
CN1701
E-2
Q501
C-2
TEST POINTS
Q502
C-2
TP402
A-3
Q503
C-2
TP403
B-1
C-3
TP1801
E-2
Q505
C-3
TP1802
E-2
Q509
Q510
C-2
TP1803
E-2
Q511
C-2
TP1804
E-2
Q512
C-2
TP1805
E-2
Q513
C-3
TP1806
E-3
Q531
C-2
BL3150F01011-1
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